With Ohio speed limit at 65mph, I am turning right around 2000 rpm at 65mph. I can feel the engine coming up onto the camshafts sweet spot right around 1900 RPM right on through 2500 RPM. I am running 265X70R-16 tires.

There's a tool out there on the Web where you can enter in your gear ratios and tire size to get RPMs at any given speed. I thought I had it book marked, but I didn't. Do a browse and see what you turn up.